@@crazyralph6386 every mechanism in the universe tends to the lowest energy point. The more energy involved the higher the chance of failure this is always true
Yeah but that only works for the one blaring it if you know all their names. Any one helicopter with guys names you don't know will immediately explode for cinematic effect.
I think that only works when played through an 8 - track. CD or MP3 may not function. In either case also use collective to control UH-1 and AH-1 of any flavor to control height, instead of cyclic.
greetings from a former huey pilot of german air force... and dont forget to establish 70 kias and 300 ft/min descent rate for strongest flappin sounds. cheers mate ;)
i'm sure we have to find this guy's name, he must have done other instructional videos. I was hoping his name is John Bransby (see the end title card) , but that's the name of the Production company. there's a few other videos from the 70s on youtube and Google by JB. I cannot make out the man's name tag at 2:01, i think i see "Millington" but i could be wrong.
As a kid I witnessed a helicopter accident were the entire rotor came off the helicopter. I remember very clearly the helicopter pulled up sharply then leveled quickly At the time the rotor separated from the aircraft and the chopper fell to the ground rolling up side down just before impact. I rode my bike to the crash site but there were clearly no survivors. That is one thing I wish I could unsee. Now, finally after 40 years I know what happened. It wasn't an Army chopper. Just a civilian.
The reason we’re all getting this recommended, is because of that viral wreck of that Robinson helicopter crash. Mast bumping is going to be most likely the cause of the accident, and this probably will save many lives of future helicopter pilots.
Very, that's because there are still a lot of teetering Rotor systems out there. More modern designs don't have much of a problem with it, i.e Bell 407, 412, 429, most of the French and Italian models etc.
@@unapologetic7900 Well I mean you aren't flying the same conditions. You're not trying to contour the ground to avoid being struck by combatants. Most helicopter flight is almost the same as fixed wing. Straight paths, wide arcs, etc etc.
These videos and this variety of narration compose most of my absolute favorite things of all times. This is what a real engineer or scientist should sound like.
@@spannaspinna The updated rotor configuration went with hydraulic framistan dampeners instead. That and the improved 'twisting' couplers have improved the slick's and the snakes handling by a bunch...although the 540 rotor system on the snake is similar, they also included the new lead-lag hydro-coupler on the swashplate feedback loop. Betcha ya didn't know that one...
In case of a zombie apocalypse your group finds a fully tanked and ready to go Huey - you wanna be the guy that says: "Oh, I know how to fly this! And don't worry y'all, I know all about how to avoid mast bumping too." "Mast-what now?"
Got many hours in Hueys, mast jumping probably caused many crashes in Nam where a sudden downward forward stick control input to follow the terrain was done to minimize targeting from the ground..But even after all these years no one knows for sure
Well, you put the question wrongly (Not a put down!) It depends on the design and they way the helicopter is flown. Some design s that predate the Huey, don't seem to have an issue with mast bumping and some designed after the Busy do have an issue with Mast Bumping. Remember designs must also take into account for cost and intended use. Humm, in America probably 90% of all cars are sold new as automatic transmissions.
But you get more control with a Manuel transmission which is an older idea..so which is better, and the automatic trans, costs more to make. I flew 5 kinds of helicopters and many different models or versions of Hueys.
I love seeing J. Don Ferguson as the narrator/ instructor? He later became one of the SEC’s best basketball officials from 1982-1992. As a former basketball clock operator at LSU during most of that that time, I had the pleasure of many pregame conversations with him and his crew. He later became a well known character actor in movies like “ The Longest Yard”, “ My Cousin Vinny” and many others. Sadly, he passed in 2008. Kind and great man!
Mast bumping gave me nightmares while I was in flight school. I was very cautious when flying stateside. Then when I arrived in country my unit IPs threw a lot o myf timidness out the window. Combat flying is different than stateside flying. Now I'm just 72 and wish I could be back in the cockpit.
It’s pretty rare(if not non existent) in the commercial/civilian world, simply cause no pilot should ever have to be that aggressive with the cyclic? If so, I’d feel sorry for the relief pilot who comes in and flys that ship, that’s all twisted to hell because of some cowboy abusing the bird. But for military ops, I can definitely see it happen quite often? In fact, I’m sure you guys had no choice to negative g-load the bird, just to avoid ground fire!!! Pretty much rolling the dice and choosing the lesser of two evils, hoping for the best? Thanks for your service!
@@AndreySloan_is_a_cnut yep, you’re right, Robbie’s are definitely the exception. Why most experienced pilots I know, NEVER apply to companies operating their flying coffins. I lost two buddies ferrying one of those death traps, only 1hr away from the factory in California.
@@crazyralph6386 - Wow, I’m sorry to hear that. I’m fixed wing only, hence why I asked that with the question mark - I knew the Robinson has had some issues, but I wasn’t certain of the exact nature of them. Why are they so more prone to issues than other piston designs? I get the issues with a low-mass rotor, but from the little I understand, that seems to only be the beginning of the problems with them (he says, reflecting on the sightseeing ride he took in o e last summer). Genuinely curious, since it is outside of my area of expertise.
I don’t know why but RUclips has been recommending me old training videos like this and how mechanical firing solutions were calculated on old warships. Good stuff
I remember watching this video from my days as a Huey crew chief. About 1990 we started getting rubber bumpers on our Hueys. By 2000 we were pretty much into Blackhawks.
@@LanaaAmor I did not. I rejoined the National Guard in 1985 and was in a Medevac unit that was activated for Desert Shield and Desert Storm. I flew with a crew out of Robert Gray Army Airfield as the crew chief , Ft Hood Texas. I was on flight staus for just about 13 years. My last 3 years I was a platoon sergeant in a Blackhawk/Chinook maintenance unit. My first 4 years 1973 to 1977 I was an MP.
This is fascinating, I’ve read a lot of firsthand accounts from Huey and Cobra pilots in Vietnam, and hadn’t heard of this problem. Probably some survivor bias could be read into that. That or, as just one of a million things they had to watch for, they didn’t feel it rated mentioning. I’m really impressed with the guys who flew early choppers that didn’t have the collective tied into the throttle. Which meant that even more planning had to go into every maneuver.
Back in the olden days in Cobras, we would unload the tail rotor ( right pedal ) to keep the fuselage from rolling. Got to be smarter than the helicopter and use all of the controls. Low g , stomp on right pedal then aft cyclic. Works with engine failure also. Survived 23 years flying AH s. The mast springs were installed because we had very little training time. Experience also went away, and the Army stopped doing the skill maneuvers.
As soon as this video demonstrated the tail rotor thrust acting above the Center of Gravity as the reason for the roll, my initial thought was why not unload the tail rotor or at least correct the inadvertent bank angle with appropriate pedal. My next though was, oh they would have thought of that. And if that doesn't work its probably because the tail rotor can not be totally unloaded, it probably always produces some thrust, just less than the main rotor torque, which still allows a yaw. I see now that I was initially correct in my understanding. These things are a Mechanical Engineers solution to flight! I lean toward fixed wing, aerodynamics and aeroelasticity.
Absolute respect for you guys, I fly a helicopter in VR flight simulators and I cant imagine doing it for a full day let alone a full career without dying
In 1966 I was in the Army in Germany. I thought helicopters were cool so I took a test to go to flight school. I passed it but chickened out cuz I always took the easy way out. I would have gone to Vietnam obviously and did not relish that idea. Hats off to those that had the balls.
Hmm. They discussed awareness of mast bumping in flight at reduced G, but never once mentioned the prohibition on negative g flight that has always been in the UH-1/AH-1 flight manual. I knew of this prohibition at age 14 when, as an air cadet on camp at an air base, 5 of us went flying in a RAAF UH-1. We did aerobatics including stall turns and wing overs to 145 degree bank angle, plus nap of the earth runs through nearby hills. Impressive, but risky.
There's no point in discussing it because there's no way that you could enter negative G without already entering low G. As well as the corrective procedures being the same as for reduced G
I've got to ride in a helicopter four times in my life. It's amazing. I've always thought it would be so cool to fly helicopters. I probably shouldn't be allowed near one. My wife bought me an r/c helicopter years ago. Every time I try to fly it and start gaining altitude I panic and crash it. It's ended up on top of the house a couple of times.
I once had the "privilege" of riding in the back of a Huey with a reserve pilot who probably got to fly about three times a year, and he was making up for lost time. Squeaks, rattles, and tree branches whipping the door frame. Well, way too close to the door anyway. I'd rather have mud on my boots than puke anytime.
I don't think this has anything to do with tandems. It's about two bladed rotors mounted with semirigid hub in low g conditions. If someone builds a tandem or a synchropter with tethered rotors it will also be subjected to mast bumping. CH47 isn't subjected to that because it has a different rotor hub design.
As a driver in Nordic (Norwegian) conditions, this sounds a lot like what happens when you meet a slippery (icy) road. If you feel the car is moving in a direction you don't want it to go, because it loses traction, it's easy to counter steer more and more, in order to get a reaction. Once the car does get traction again, the counter steer is hard and you violently jerk and end up somewhere you didn't want the car to go. When you feel the car slip a bit and start going somewhere you don't want it to go, you need to be gentle on the steering wheel. Once it gets traction again, it's easy to control where the car goes, then. This sounds like the same thing, only instead of regaining traction, you loose the wheels and fly off a cliff. Luckily, today you can experience this is super expensive simulators, without the loss of life. It is necessary to train this, because that way you know instinctively to be gentle on the controls once the low G's happens.
"The automatic lungulator was designed to control primary inclinometer destabulaor input. Due to thrust of the prembulator disc and the knobulation triangular disination damper, this increase in the possibility of dissembulation is exacerbated during low G operation..."..perfectly clear to me ...
Who is this gentleman in the video (the one demonstrating mast bumping)? I really enjoy watching these older videos like this. Very clear, calm, and to the point.
This narrator really gets around. Back in the seventies and eighties used to pitch automobiles for Dan Vaden Chevrolet in Savannah Georgia. His name is Don Ferguson. en.wikipedia.org/wiki/J._Don_Ferguson
As someone who has never flown a huey before, I'm glad youtube recommended this to me. You never know when a huey spawns out of nowhere and you can suddenly become a helicopter pilot.
I was stationed at Ft Campbell. Ky after I got back from Nam...used to watch them fly over the base in 101 formation...cool then . I was a medic 3rd Field Hospital OR Saigon. 1972
i fly RC helis :D we can do crazy stuff becouse our rotor systems are rigid or semi-rigid we also have scale working for us since the blades can be made much stiffer and we have little flapping add on insane power to weight and you have an aircraft that can do just about any thing
So if your were not afraid of flying a chopper before, you should be now. Folks, we have a s load of more videos to watch if you want to fly your chopper and return in one piece. After watching and understanding a few dozen of these, you will fully appreciate the simplicity and safety of flying an inherently unstable aerodynamic body.
This reminds me of speed wobble in a motorcycle which can lead to tank slapping. Counterintuitively, the correct response is to let go of the handlebars.
What amuses me is that in the entire 20 minute video, there is only one point where they remotely suggest it will result in your death by the rotor basically sheering itself off and if you weren't paying attention or technically brained enough in that exact moment you would never know.
@IRIQUOIS227 With a fully-articulated rotor, each blade has its own flapping hinge (instead of 1 central flapping-hub), with a certain offset (hinge-offset) from the mast: ------o-|-o------ Since the blade ( ------ ) flaps around its own flapping-hinge ( o ), it or its hinge can never hit the mast. ( -|- ) Therefore a F.A.-rotor is not sensitive for mastbumping.
@@somaday2595 Yes, but it can still create metal-fatigue (if metal flexibility is used) or a tail-hits with extreme manouvres. UH-60's rotor design is a very reliable design but also has a pretty sloppy response. That is (one reason) why modern heli's don't use this method because the roll/pitch response of the heli-frame is based on gravity, not torque from the rotor. With a FA-rotor you can use the lift-difference between fwd-aft and left-right to create a torque on the mast and hence the frame. This bends the mast and creates forces on the bearings of the rotor-mast besides lift, but if built sturdy then it can be used, and makes your body more responsive which is useful for quick and accurate reaction (when eg carrying rocket pods).
Is rotor tilt an indirect control, influenced by flight characteristics? Or could you induce mast bumping simply by jamming the cyclic as far as it will go under any condition?
Simply jamming the cyclic will create an entirely different but equally dangerous situation, at least depending on airspeed. At high speeds your helicopter would roll and could possibly flip upside down. At lower speeds you're less likely to flip, but sliding quickly and suddenly left or right can send you into an obstacle, or it could gain you the airspeed needed to flip the aircraft over. Rotor tilt as a whole is controlled by the pilot directly through the cyclic controls, and indirectly by the aerodynamic properties of the rotor blades. It's like a horse, you can direct it where you'd like it to be, but if you do it in a way your blades don't like they won't cooperate.
It sounds like Cobras had the best opportunity to encounter mast bumping after making a ground attack then pulling up sharply and at the top of the climb they would push the cyclic hard forward to go back into another attack run. At the top of the climb when the rotor speed was building up and the hard push on the cyclic the rotor head would bang into the mast and physically break it off. This of course caused a dive that could not be recovered from.
No idea how I got here. I’m not a helo pilot but this film seems really important. If I ever end up in a UH-1 I’ll be sure to watch negative G situations and pull collective after if it can’t be avoided
the guy at 2:10, is there a name for that way people from that time period sounded like? I know it has to do with the recording equipment, but I'm looking into recreating the effect for creative ideas or something. any help is appreciated, thank.
Not a pilot but I guess I’m ready in the event I’m thrust into combat and the pilot and co-pilot become unable to perform their duty. Not sure why I’m fascinated by videos I will never have a use for;)
I'll never fly a helicopter but this seems like an important thing to be aware of
It might come in handy when they add helicopters to Microsoft Flight Simulator.
It was a bigger issue on Cobras based on the way they were flown.
It was probably the main factor in a recent fatal accident.
ruclips.net/video/sMQFx7EipKU/видео.html
Almost as practical for the layman as a tutorial on how to safely operate your nuclear submarine.
🎯
They're not joking when they say a Helicopter is trying to kill you as soon as you start the engine.
50 thousand moving parts, trying to become undone.
Kobe
Flying a helicopter is just a race against time to get to the LZ before the helicopter remembers it isn’t supposed to be able to fly.
@@ireviewshtuff well, helicopters don't fly, they can't. They beat the air into submission.
@@crazyralph6386 every mechanism in the universe tends to the lowest energy point. The more energy involved the higher the chance of failure this is always true
Speaker: "As an Army helicopter pilot, you must understand mast bumping"
Me (a highschool teacher): "All right"
That's Sir, yes sir.
Film is from 1980, we were teaching kids right out of high school how to fly those.
at least you could teach your students how to fly one in DCS lol
@@nabilbudiman ah yes I see, a man of culture
@@westondavis1682 You forgot to call him "private Pyle"
As a UH-1 helicopter pilot, I can confirm the proper way to avoid mast bumping is to always be playing Fortunate Son at high volume
While doing maybe 100 knts at treetop level. "Those were th' days my friend..."
Yeah but that only works for the one blaring it if you know all their names. Any one helicopter with guys names you don't know will immediately explode for cinematic effect.
I think that only works when played through an 8 - track. CD or MP3 may not function. In either case also use collective to control UH-1 and AH-1 of any flavor to control height, instead of cyclic.
Love it.
ruclips.net/video/UoOXlVBlFRA/видео.html
greetings from a former huey pilot of german air force... and dont forget to establish 70 kias and 300 ft/min descent rate for strongest flappin sounds. cheers mate ;)
I don't know why youtube recommended this to me but I watched all 20 minutes. The man has a voice of an angel.
one day, don't know why, you will be put in a UH-1 at low altitude.. then .. you know why
i'm sure we have to find this guy's name, he must have done other instructional videos. I was hoping his name is John Bransby (see the end title card) , but that's the name of the Production company. there's a few other videos from the 70s on youtube and Google by JB.
I cannot make out the man's name tag at 2:01, i think i see "Millington" but i could be wrong.
@@Defender78 J. Don Ferguson is the name
As a kid I witnessed a helicopter accident were the entire rotor came off the helicopter.
I remember very clearly the helicopter pulled up sharply then leveled quickly At the time the rotor separated from the aircraft and the chopper fell to the ground rolling up side down just before impact.
I rode my bike to the crash site but there were clearly no survivors. That is one thing I wish I could unsee.
Now, finally after 40 years I know what happened. It wasn't an Army chopper. Just a civilian.
Wow that sounds traumatizing to see as a kid
@@DamplyDooas a human
Can't imagine that horrible vision. Bet you had night mares for ages.
Didn’t tighten the Jesus bolt?
@@jonginder5494Mast shear. The whole point of this video.
The reason we’re all getting this recommended, is because of that viral wreck of that Robinson helicopter crash. Mast bumping is going to be most likely the cause of the accident, and this probably will save many lives of future helicopter pilots.
It's fun watching the algorithm work in real time.
What does this have to do with delta-p and crabs?
Forty years later and this video is still relevant 👍
Very, that's because there are still a lot of teetering Rotor systems out there. More modern designs don't have much of a problem with it, i.e Bell 407, 412, 429, most of the French and Italian models etc.
ye physics is still a thing.
@@unapologetic7900 Well I mean you aren't flying the same conditions. You're not trying to contour the ground to avoid being struck by combatants. Most helicopter flight is almost the same as fixed wing. Straight paths, wide arcs, etc etc.
I consider it to be largely irrelevant. I don't even know if this whole flapping thing is even true. Sounds pretty contrived to me. Conspiratorial.
These videos and this variety of narration compose most of my absolute favorite things of all times. This is what a real engineer or scientist should sound like.
lol
I was waiting for him to start talking about pre famulated amulite and spurving springs
@@spannaspinna The updated rotor configuration went with hydraulic framistan dampeners instead. That and the improved 'twisting' couplers have improved the slick's and the snakes handling by a bunch...although the 540 rotor system on the snake is similar, they also included the new lead-lag hydro-coupler on the swashplate feedback loop. Betcha ya didn't know that one...
@@spannaspinna and side fumbling prevention 😀
@@kentanch2601 especially on the cardinal grameters
I don't know why some videos are recommended to me but I feel like it's really important that I know these things.
In case of a zombie apocalypse your group finds a fully tanked and ready to go Huey - you wanna be the guy that says: "Oh, I know how to fly this! And don't worry y'all, I know all about how to avoid mast bumping too."
"Mast-what now?"
Got many hours in Hueys, mast jumping probably caused many crashes in Nam where a sudden downward forward stick control input to follow the terrain was done to minimize targeting from the ground..But even after all these years no one knows for sure
Do the modern helicopters have this issue too or is this just a matter of old technology?
Well, you put the question wrongly (Not a put down!) It depends on the design and they way the helicopter is flown. Some design s that predate the Huey, don't seem to have an issue with mast bumping and some designed after the Busy do have an issue with Mast Bumping. Remember designs must also take into account for cost and intended use. Humm, in America probably 90% of all cars are sold new as automatic transmissions.
But you get more control with a Manuel transmission which is an older idea..so which is better, and the automatic trans, costs more to make. I flew 5 kinds of helicopters and many different models or versions of Hueys.
Interested in flying helicopters?
@@raywhitehead730 Thanks for the info! I really don't know anything about helicopters but recently have taken an interest and stumbled on this video.
I love seeing J. Don Ferguson as the narrator/ instructor? He later became one of the SEC’s best basketball officials from 1982-1992. As a former basketball clock operator at LSU during most of that that time, I had the pleasure of many pregame conversations with him and his crew. He later became a well known character actor in movies like “ The Longest Yard”, “ My Cousin Vinny” and many others. Sadly, he passed in 2008. Kind and great man!
Mast bumping gave me nightmares while I was in flight school. I was very cautious when flying stateside. Then when I arrived in country my unit IPs threw a lot o myf timidness out the window. Combat flying is different than stateside flying. Now I'm just 72 and wish I could be back in the cockpit.
Careful what you wish for! There are old pilots and bold pilots, but no old, bold pilots.
It’s pretty rare(if not non existent) in the commercial/civilian world, simply cause no pilot should ever have to be that aggressive with the cyclic? If so, I’d feel sorry for the relief pilot who comes in and flys that ship, that’s all twisted to hell because of some cowboy abusing the bird.
But for military ops, I can definitely see it happen quite often? In fact, I’m sure you guys had no choice to negative g-load the bird, just to avoid ground fire!!! Pretty much rolling the dice and choosing the lesser of two evils, hoping for the best? Thanks for your service!
@@crazyralph6386 - R-44?
@@AndreySloan_is_a_cnut yep, you’re right, Robbie’s are definitely the exception. Why most experienced pilots I know, NEVER apply to companies operating their flying coffins.
I lost two buddies ferrying one of those death traps, only 1hr away from the factory in California.
@@crazyralph6386 - Wow, I’m sorry to hear that. I’m fixed wing only, hence why I asked that with the question mark - I knew the Robinson has had some issues, but I wasn’t certain of the exact nature of them. Why are they so more prone to issues than other piston designs? I get the issues with a low-mass rotor, but from the little I understand, that seems to only be the beginning of the problems with them (he says, reflecting on the sightseeing ride he took in o e last summer). Genuinely curious, since it is outside of my area of expertise.
I don’t know why but RUclips has been recommending me old training videos like this and how mechanical firing solutions were calculated on old warships. Good stuff
I remember watching this video from my days as a Huey crew chief. About 1990 we started getting rubber bumpers on our Hueys. By 2000 we were pretty much into Blackhawks.
woah... hueys stayed around for that long? I thought blackhawks were introduced in the 90s
@@LanaaAmor yes, they were around until the mid 2000's in some legacy units. We lost all of ours in Iowa around 2002.
@@krisgreenwood5173 did they fly into combat?
@@LanaaAmor I did not. I rejoined the National Guard in 1985 and was in a Medevac unit that was activated for Desert Shield and Desert Storm. I flew with a crew out of Robert Gray Army Airfield as the crew chief , Ft Hood Texas. I was on flight staus for just about 13 years. My last 3 years I was a platoon sergeant in a Blackhawk/Chinook maintenance unit. My first 4 years 1973 to 1977 I was an MP.
@@LanaaAmor Marines still fly a recently upgraded variant of the twin engine huey, the UH-1Y Venom Gunship
This is fascinating, I’ve read a lot of firsthand accounts from Huey and Cobra pilots in Vietnam, and hadn’t heard of this problem. Probably some survivor bias could be read into that. That or, as just one of a million things they had to watch for, they didn’t feel it rated mentioning. I’m really impressed with the guys who flew early choppers that didn’t have the collective tied into the throttle. Which meant that even more planning had to go into every maneuver.
I am so glad the algorithm sent this video to me. Mast bumping was never on my radar until now.
I know nothing about helicopters or the military, I don’t know how this got in my recommended, but I can’t stop watching
Back in the olden days in Cobras, we would unload the tail rotor ( right pedal ) to keep the fuselage from rolling. Got to be smarter than the helicopter and use all of the controls. Low g , stomp on right pedal then aft cyclic. Works with engine failure also.
Survived 23 years flying AH s. The mast springs were installed because we had very little training time. Experience also went away, and the Army stopped doing the skill maneuvers.
This just proves that helicopters can’t actually fly, and flying them is a constant task of convincing them they can.
That sounds scary to do one slip up and u could die
As soon as this video demonstrated the tail rotor thrust acting above the Center of Gravity as the reason for the roll, my initial thought was why not unload the tail rotor or at least correct the inadvertent bank angle with appropriate pedal.
My next though was, oh they would have thought of that. And if that doesn't work its probably because the tail rotor can not be totally unloaded, it probably always produces some thrust, just less than the main rotor torque, which still allows a yaw.
I see now that I was initially correct in my understanding.
These things are a Mechanical Engineers solution to flight! I lean toward fixed wing, aerodynamics and aeroelasticity.
Absolute respect for you guys, I fly a helicopter in VR flight simulators and I cant imagine doing it for a full day let alone a full career without dying
I am unemployed living with parents and have never been on a helicopter but yt thinks it important for me to watch this at 2AM in the morning.
only you can prevent mast bumping... and forest fires. great video, love the music :)
In 1966 I was in the Army in Germany. I thought helicopters were cool so I took a test to go to flight school. I passed it but chickened out cuz I always took the easy way out. I would have gone to Vietnam obviously and did not relish that idea. Hats off to those that had the balls.
anyone who uses a pocket protector knows what they are talking about.
Lmao
Best knowledge !!
Not too many ppl know the simple basics !!
Thank you !!
The music gives the years . Great upload!
Hmm. They discussed awareness of mast bumping in flight at reduced G, but never once mentioned the prohibition on negative g flight that has always been in the UH-1/AH-1 flight manual. I knew of this prohibition at age 14 when, as an air cadet on camp at an air base, 5 of us went flying in a RAAF UH-1. We did aerobatics including stall turns and wing overs to 145 degree bank angle, plus nap of the earth runs through nearby hills. Impressive, but risky.
There's no point in discussing it because there's no way that you could enter negative G without already entering low G. As well as the corrective procedures being the same as for reduced G
You were the guy who got the soap in Full Metal Jacket, weren't you?
Wow, they make such great quality documentaries.
I've got to ride in a helicopter four times in my life. It's amazing. I've always thought it would be so cool to fly helicopters. I probably shouldn't be allowed near one. My wife bought me an r/c helicopter years ago. Every time I try to fly it and start gaining altitude I panic and crash it. It's ended up on top of the house a couple of times.
I once had the "privilege" of riding in the back of a Huey with a reserve pilot who probably got to fly about three times a year, and he was making up for lost time. Squeaks, rattles, and tree branches whipping the door frame. Well, way too close to the door anyway. I'd rather have mud on my boots than puke anytime.
Ok for real this guy has a awsome narrator voice, he could probly give a lecture about chewing gum and it would be thrilling
Check out how perfectly drawn the diagrams on the chalkboard are! 10/10 Production rating.
hahah
For real smokers voice
😂🤣😜
i guess I'm pretty off topic but does anybody know a good website to watch newly released tv shows online?
Troy McClure sure did a great job here presenting a bunch of content that he didn't understand a word of!
i love that super low altitude flying over the top of the hill, nowadays people would be terrified by flying like that
That was very impressive maneuvering…
They wouldn't even be allowed to do it without getting in trouble.
Do they never fly Nap of Earth in, say, the Blackhawk?
Edit: I now see which part you mean tho, very impressive.
@@hunormagyar1843 iits possible flying like this might still be done in the military but i doubt theyd ever show it in an educational video for pilots
God Bless the US Army!
Thanks for posting this. It's old and crusty, but the information is timeless.
Excellent Topic and Solutions 😀😮😀
All of the old army training films and manuals are great information
I've got over 200 flight hrs on a CH47 with over 50 NVG hours. Never had to worry about it. Tandem rotors rule
Crazy to see how a machine larger than a schoolbus can move. I love the big brutes.
I don't think this has anything to do with tandems. It's about two bladed rotors mounted with semirigid hub in low g conditions. If someone builds a tandem or a synchropter with tethered rotors it will also be subjected to mast bumping. CH47 isn't subjected to that because it has a different rotor hub design.
Thank you. I’ll keep this in mind when I’m flying around in my UH-1.
Dude, too funny. Dont forget to check your mast.
As a driver in Nordic (Norwegian) conditions, this sounds a lot like what happens when you meet a slippery (icy) road. If you feel the car is moving in a direction you don't want it to go, because it loses traction, it's easy to counter steer more and more, in order to get a reaction. Once the car does get traction again, the counter steer is hard and you violently jerk and end up somewhere you didn't want the car to go. When you feel the car slip a bit and start going somewhere you don't want it to go, you need to be gentle on the steering wheel. Once it gets traction again, it's easy to control where the car goes, then.
This sounds like the same thing, only instead of regaining traction, you loose the wheels and fly off a cliff.
Luckily, today you can experience this is super expensive simulators, without the loss of life. It is necessary to train this, because that way you know instinctively to be gentle on the controls once the low G's happens.
Good narration by the narrator guy narrating so well.
These guys mastered RUclips's algorithm before it ever even existed...
May SB-1 Defiant project success!
"The automatic lungulator was designed to control primary inclinometer destabulaor input. Due to thrust of the prembulator disc and the knobulation triangular disination damper, this increase in the possibility of dissembulation is exacerbated during low G operation..."..perfectly clear to me ...
You failed to mention the Flux Capacitor.
The voice🙂
Using the included advice, side fumbling was effectively prevented.
I must have been sleeping during this part of the video.
Now I can't unhear it.
The high frequency noise in this video is drilling into my skull. 😂
Seriously. THe pain
Who is this gentleman in the video (the one demonstrating mast bumping)? I really enjoy watching these older videos like this. Very clear, calm, and to the point.
This narrator really gets around. Back in the seventies and eighties used to pitch automobiles for Dan Vaden Chevrolet in Savannah Georgia. His name is Don Ferguson. en.wikipedia.org/wiki/J._Don_Ferguson
The music is great too!
As someone who has never flown a huey before, I'm glad youtube recommended this to me. You never know when a huey spawns out of nowhere and you can suddenly become a helicopter pilot.
Me in my underwear on my couch on a Saturday afternoon:
Good thing i know how to prevent this now
I'm sure he knows what he's talking about...after all he's got an awesome pocket protector
This old school teaching is very effective
I love these videos, thanks for uploading. Always be safe.
this song is soulful and kino
Very informative, thanks for archiving.
I appreciate the helicopter stunt scenes on The A Team so much more after learning this stuff.
dude had a great voice
I personally only saw once, visible evidence of mast bumping, on the mast itself. You could see the dent in the mast, thank god he got back safe.
I can't believe I got to see "The Voice"!
sweet video
Remember this video when I was at Rucker going through flight school back in the 1990's
I lived at nearby Enterprise in '83. Loved to see those Hueys; there were lots of them!
I was stationed at Ft Campbell. Ky after I got back from Nam...used to watch them fly over the base in 101 formation...cool then . I was a medic 3rd Field Hospital OR Saigon. 1972
i fly RC helis :D we can do crazy stuff becouse our rotor systems are rigid or semi-rigid
we also have scale working for us since the blades can be made much stiffer and we have little flapping
add on insane power to weight and you have an aircraft that can do just about any thing
14 years later it recommended to me thanks you youtube
Love all these new comments on a older video.
So if your were not afraid of flying a chopper before, you should be now.
Folks, we have a s load of more videos to watch if you want to fly your chopper and return in one piece.
After watching and understanding a few dozen of these, you will fully appreciate the simplicity and safety of flying an inherently unstable aerodynamic body.
This is even more important these day, with so many people flying all those lightly built Robbies.
Yes. Like the one that recently fell with the tail rotor severed.
@@MrTruckerf and that was Diffenetly Mast Bumping
The actor giving the lecture played the Governor of Tennessee in the movie Tank in 1984.
I love Tank, James Garner kicked ass
New drinking game. Take a shot every time "mast bumping" is said in the video.
This reminds me of speed wobble in a motorcycle which can lead to tank slapping. Counterintuitively, the correct response is to let go of the handlebars.
"When in doubt, pin it" works in most situations, too.
Super video !!!!!! Very well done !!!!
This will come in handy
Never, but I had to watch.
What amuses me is that in the entire 20 minute video, there is only one point where they remotely suggest it will result in your death by the rotor basically sheering itself off and if you weren't paying attention or technically brained enough in that exact moment you would never know.
Very Old but Very Accurate
@IRIQUOIS227 With a fully-articulated rotor, each blade has its own flapping hinge (instead of 1 central flapping-hub), with a certain offset (hinge-offset) from the mast:
------o-|-o------
Since the blade ( ------ ) flaps around its own flapping-hinge ( o ), it or its hinge can never hit the mast. ( -|- )
Therefore a F.A.-rotor is not sensitive for mastbumping.
So this adding four more hinges and other goodies reduces the chance of mast bumping on UH-60s?
@@somaday2595 Yes, but it can still create metal-fatigue (if metal flexibility is used) or a tail-hits with extreme manouvres. UH-60's rotor design is a very reliable design but also has a pretty sloppy response. That is (one reason) why modern heli's don't use this method because the roll/pitch response of the heli-frame is based on gravity, not torque from the rotor. With a FA-rotor you can use the lift-difference between fwd-aft and left-right to create a torque on the mast and hence the frame. This bends the mast and creates forces on the bearings of the rotor-mast besides lift, but if built sturdy then it can be used, and makes your body more responsive which is useful for quick and accurate reaction (when eg carrying rocket pods).
Flying a helicopter is like trying to balance a baseball bat on your hand
I waited the whole video for the Airwolf theme to kick in
Is rotor tilt an indirect control, influenced by flight characteristics? Or could you induce mast bumping simply by jamming the cyclic as far as it will go under any condition?
it seems that in high rpm situations, centripetal force counteracts mast rocking
Simply jamming the cyclic will create an entirely different but equally dangerous situation, at least depending on airspeed.
At high speeds your helicopter would roll and could possibly flip upside down. At lower speeds you're less likely to flip, but sliding quickly and suddenly left or right can send you into an obstacle, or it could gain you the airspeed needed to flip the aircraft over.
Rotor tilt as a whole is controlled by the pilot directly through the cyclic controls, and indirectly by the aerodynamic properties of the rotor blades. It's like a horse, you can direct it where you'd like it to be, but if you do it in a way your blades don't like they won't cooperate.
It sounds like Cobras had the best opportunity to encounter mast bumping after making a ground attack then pulling up sharply and at the top of the climb they would push the cyclic hard forward to go back into another attack run. At the top of the climb when the rotor speed was building up and the hard push on the cyclic the rotor head would bang into the mast and physically break it off. This of course caused a dive that could not be recovered from.
I love these old films!
Makes me appreciate the skill of the guy who flew Airwolf .
Love the video but the high pitch noise during it makes it unbearable to watch almost
Great time to reccomend this...
How can it be that these old declassified military like sounding videos are often so good?
Fascinating film. And all this time I thought bumping your mast made you go blind.
No idea how I got here. I’m not a helo pilot but this film seems really important. If I ever end up in a UH-1 I’ll be sure to watch negative G situations and pull collective after if it can’t be avoided
If you dont have tinnitus before this video, you'll sure as hell have it after this video.
R44 crash video led me here
Me too
The New Zealand crash? Me too.
Groovy music daddio. It was a cool and groovin' sound.
14 years later this video appears in my recommended.
Love the feel and speed of life back then.
A more civilized and gentler time.
I keep thinking "When are the Mystery Science Theater guys going to show up?"
0:17 young pilots should avoid excessive mast bumping from excessive flapping and abrupt control movements.
Mast bumping was your mothers favorite activity in college
The best side of youtube
ill remember this.. not sure when i will need it, but i might
And WHHYYYY is everyone all-of-a-sudden seeing this 14 year old video? Way to go, YT algorithm!
@blancolirio this is a perfect complement to your video
the guy at 2:10, is there a name for that way people from that time period sounded like? I know it has to do with the recording equipment, but I'm looking into recreating the effect for creative ideas or something. any help is appreciated, thank.
Love the music!
Screw it. I'll just drive.
I didn't even know this was a thing. Very interesting.
05:55...The sounds of the AH-1 rotorcraft, called Hell's Disco in the Jungle, during the Vietnam War !
Not a pilot but I guess I’m ready in the event I’m thrust into combat and the pilot and co-pilot become unable to perform their duty.
Not sure why I’m fascinated by videos I will never have a use for;)
Thanks for this! Now I know exactly what to do the next time I will never fly an helicopter in my life!